Pills

A man went to the doctors because he hadn't been feeling well. The doctor examined him, left the room and came back with three different kinds of pills.

"Take the red pill with a big glass of water when you get up," the doctor said, "and the yellow pill with a big glass of water after lunch, and the green pill with a big glass of water before you go to bed."

The man looked worried and asked, "But doctor, what's actually wrong with me?"

The doctor replied, "You're not drinking enough water."